.box{
    width: 100%;
    height: 550px;
    background-color: #fff; 
}
.lunbo{
     height: 550px;
     background-color: #ff6600;
     position: relative;
}

.swiper-container{
     width: 1190px;
     height: 400px;
     margin:0 auto;
     #case5{
           --swiper-theme-color: #ff6600;
           --swiper-pagination-color: #00ff33;/* 两种都可以 */
     }
     .swiper-button-next {
           width: 40px;
           height: 100px;
           background-color: rgba(0, 0, 0 ,.1);
           color: #fff;
           right: 0;
           left: auto;
     }
     .swiper-button-prev {
           width: 40px;
           height: 100px;
           background-color: rgba(0, 0, 0 ,.1);
           left: 240px !important;
           right: auto;
           color: #fff;
     }
     img{
           width: 100%;
           height: 100%;
     }
}


.lunbo-nav{
     width: 240px;
     height: 550px;
     background-color: royalblue;
     position: absolute;
     top: 0;left: 0;
     z-index: 1000;
}
.lunbo-nav-A{
     height: 60.2px;
     width: 240px;
}
.lunbo-nav-A .zuo{
     float: left;
}
.lunbo-nav .zuo li{
     height: 60.2px;
     width: 240px;
     display: block;
     // vertical-align: bottom;
     background-color: #fff;
     line-height: 20px;
     border-bottom: 1px solid #f5f5f5;
     position: relative;
     
}
.lunbo-nav .zuo li .A{
     font-weight: 700;
     color: #000;
     line-height: 22px;
     font-size: 14px;
     display: block;
     margin-right: 10px;
     padding-left: 8px;
     padding-top: 8px;
}
.lunbo-nav-1 a {
     color: #8a8a8a;
     font-size: 12px;
     padding-left: 8px;
     margin-right: 0;
     }
.lunbo-xia{
     width: 100%;
     height: 140px;
     margin-top: 10px;
}
.lunbo-xia-1{
     height: 140px;
     display: block;
     margin: 0 auto;
     // background-color: blueviolet;
     position: relative;
}
.lunbo-xia-xia{
     width: 940px;
     margin-left: 250px;
     height: 100%;
     // background-color: aquamarine;
     position: absolute;
}
.lunbo-xia-xia a{
     width: 340px;
     height: 140px; 
     display: block;
     float: left;
}
.lunbo-xia-1 img{
   width: 100%;
   height: 100%;
   float: left;
}
.lunbo-xia-2 a{
     width: 290px;
     height: 140px;
     display: block;
     float: left;
     margin-left: 10px;
}
.lunbo-xia-2 img{
     width: 100%;
     height: 100%;
}